/* ================================================================
   ETF Backtesting Dashboard - Styles
   Premium dark-mode design with glassmorphism
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ----------------------------------------------------------------
   CSS Custom Properties
   ---------------------------------------------------------------- */
:root {
    /* Background */
    --bg-primary: #06060f;
    --bg-secondary: #0d0d1a;
    --bg-card: rgba(15, 15, 30, 0.7);
    --bg-card-hover: rgba(20, 20, 40, 0.85);
    --bg-glass: rgba(255, 255, 255, 0.03);

    /* Text */
    --text-primary: #e8e8f0;
    --text-secondary: #8888a8;
    --text-muted: #555570;
    --text-bright: #ffffff;

    /* Borders */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-accent: rgba(255, 255, 255, 0.1);

    /* Accent colors for ETFs */
    --etf-1: #6366f1;       /* Indigo - MAG 10 */
    --etf-1-glow: rgba(99, 102, 241, 0.3);
    --etf-2: #06b6d4;       /* Cyan - EAFE */
    --etf-2-glow: rgba(6, 182, 212, 0.3);
    --etf-3: #f59e0b;       /* Amber - EEM */
    --etf-3-glow: rgba(245, 158, 11, 0.3);

    /* Benchmark colors */
    --bench-1: #64748b;     /* Slate - SPY */
    --bench-2: #94a3b8;     /* Light slate - EFA */
    --bench-3: #78716c;     /* Stone - EEM benchmark */
    --bench-4: #a1a1aa;     /* Zinc - VT */

    /* Semantic colors */
    --green: #10b981;
    --green-bg: rgba(16, 185, 129, 0.12);
    --red: #ef4444;
    --red-bg: rgba(239, 68, 68, 0.12);
    --yellow: #f59e0b;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    --gradient-card: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(6, 182, 212, 0.04) 100%);

    /* Spacing */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    /* Shadows */
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--border-subtle);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.08);
}

/* ----------------------------------------------------------------
   Reset & Base
   ---------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Ambient background glow */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 30% 20%, rgba(99, 102, 241, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 60%, rgba(6, 182, 212, 0.04) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(245, 158, 11, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ----------------------------------------------------------------
   Layout
   ---------------------------------------------------------------- */
.dashboard {
    position: relative;
    z-index: 1;
    max-width: 1440px;
    margin: 0 auto;
    padding: 32px 24px;
}

/* ----------------------------------------------------------------
   Header
   ---------------------------------------------------------------- */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    position: relative;
}

.header__title {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
    line-height: 1.1;
}

.header__subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 20px;
}

.header__meta {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.header__meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.header__meta-item svg {
    width: 14px;
    height: 14px;
    opacity: 0.5;
}

.header__meta-value {
    color: var(--text-secondary);
    font-weight: 500;
}

/* ----------------------------------------------------------------
   Cards
   ---------------------------------------------------------------- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-card);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-card), var(--shadow-glow);
}

.card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card__title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-bright);
    display: flex;
    align-items: center;
    gap: 8px;
}

.card__title-icon {
    width: 20px;
    height: 20px;
    opacity: 0.7;
}

/* ----------------------------------------------------------------
   Metrics Grid
   ---------------------------------------------------------------- */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.metric-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 20px;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s ease, border-color 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-accent);
}

.metric-card__label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 500;
    margin-bottom: 8px;
}

.metric-card__value {
    font-size: 1.6rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    line-height: 1.2;
}

.metric-card__subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.metric-card--positive .metric-card__value { color: var(--green); }
.metric-card--negative .metric-card__value { color: var(--red); }
.metric-card--neutral .metric-card__value { color: var(--text-primary); }

/* Glow indicator on metric cards */
.metric-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.metric-card--positive::after { background: var(--green); }
.metric-card--negative::after { background: var(--red); }

/* ----------------------------------------------------------------
   Time Controls
   ---------------------------------------------------------------- */
.time-controls-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 16px 24px;
    margin-bottom: 24px;
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.time-controls__label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-bright);
    display: flex;
    align-items: center;
    gap: 8px;
}

.time-controls__label svg {
    width: 18px;
    height: 18px;
    opacity: 0.7;
}

.time-controls__presets {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.preset-btn {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-btn:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
    border-color: rgba(99, 102, 241, 0.4);
}

.preset-btn.active {
    background: var(--etf-1);
    color: #fff;
    border-color: var(--etf-1);
    box-shadow: 0 0 10px var(--etf-1-glow);
}

.preset-btn.outline-btn {
    background: transparent;
    border: 1px dashed var(--text-secondary);
    color: var(--text-secondary);
}

.preset-btn.outline-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-bright);
    border-color: var(--text-bright);
}

.custom-saved-preset {
    border-color: var(--etf-2) !important;
}

.custom-saved-preset.active {
    background: var(--etf-2);
    border-color: var(--etf-2) !important;
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.4);
}

.delete-preset:hover {
    color: var(--red);
    opacity: 1 !important;
}

.time-controls__custom {
    display: flex;
    align-items: center;
    gap: 8px;
}

.date-separator {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.date-input {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    outline: none;
    transition: border-color 0.2s ease;
    color-scheme: dark;
}

.date-input:focus {
    border-color: var(--etf-1);
}

.date-input::-webkit-calendar-picker-indicator {
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.date-input::-webkit-calendar-picker-indicator:hover {
    opacity: 1;
}

/* ----------------------------------------------------------------
   Chart containers
   ---------------------------------------------------------------- */
.chart-container {
    position: relative;
    width: 100%;
    height: 420px;
}

.chart-container--small {
    height: 300px;
}

.chart-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

/* ----------------------------------------------------------------
   Performance Table
   ---------------------------------------------------------------- */
.perf-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-md);
}

.perf-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.9rem;
}

.perf-table thead th {
    background: rgba(99, 102, 241, 0.08);
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.75rem;
    padding: 14px 16px;
    text-align: right;
    border-bottom: 1px solid var(--border-subtle);
    position: sticky;
    top: 0;
    cursor: pointer;
    user-select: none;
    transition: background 0.2s ease;
    white-space: nowrap;
}

.perf-table thead th:first-child {
    text-align: left;
    border-radius: var(--radius-sm) 0 0 0;
}

.perf-table thead th:last-child {
    border-radius: 0 var(--radius-sm) 0 0;
}

.perf-table thead th:hover {
    background: rgba(99, 102, 241, 0.15);
    color: var(--text-primary);
}

.perf-table thead th.sorted-asc::after { content: ' ▲'; font-size: 0.65rem; }
.perf-table thead th.sorted-desc::after { content: ' ▼'; font-size: 0.65rem; }

.perf-table tbody tr {
    transition: background 0.15s ease;
}

.perf-table tbody tr:hover {
    background: rgba(99, 102, 241, 0.06);
}

.perf-table tbody td {
    padding: 12px 16px;
    text-align: right;
    border-bottom: 1px solid var(--border-subtle);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

.perf-table tbody td:first-child {
    text-align: left;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    color: var(--text-bright);
}

.perf-table .positive { color: var(--green); }
.perf-table .negative { color: var(--red); }

.etf-badge {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 8px;
    vertical-align: middle;
}

.bench-row td:first-child {
    color: var(--text-secondary);
    font-weight: 400;
}

/* ----------------------------------------------------------------
   Holdings Inspector
   ---------------------------------------------------------------- */
.holdings-controls {
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.control-group label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 500;
}

.control-group select,
.control-group input[type="range"] {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s ease;
    min-width: 180px;
}

.control-group select:focus {
    border-color: var(--etf-1);
}

.control-group select option {
    background: var(--bg-secondary);
}

.date-display {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    color: var(--text-primary);
    padding: 8px 16px;
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
}

.slider-container {
    flex: 1;
    min-width: 200px;
}

.slider-container input[type="range"] {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-secondary);
    border-radius: 3px;
    outline: none;
    border: none;
    padding: 0;
}

.slider-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--etf-1);
    cursor: pointer;
    box-shadow: 0 0 10px var(--etf-1-glow);
    transition: transform 0.15s ease;
}

.slider-container input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.holdings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
}

.holding-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    text-align: left;
    transition: transform 0.2s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.holding-card__header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 2px;
}

.holding-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-accent);
}

.holding-card__ticker {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-bright);
}

.holding-card__name {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.holding-card__weight {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-bright);
}

.holding-card__bar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--etf-1);
    opacity: 0.6;
}

/* ----------------------------------------------------------------
   Heatmap
   ---------------------------------------------------------------- */
.heatmap-container {
    overflow-x: auto;
}

.heatmap-controls {
    display: flex;
    gap: 16px;
    align-items: center;
    margin-bottom: 16px;
}

.heatmap-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 3px;
    font-size: 0.8rem;
}

.heatmap-table th {
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.7rem;
    padding: 8px 4px;
    text-align: center;
}

.heatmap-table th:first-child {
    text-align: right;
    padding-right: 12px;
}

.heatmap-table td {
    text-align: center;
    padding: 8px 4px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    font-weight: 500;
    transition: transform 0.15s ease;
    cursor: default;
    min-width: 52px;
}

.heatmap-table td:first-child {
    background: none !important;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    text-align: right;
    padding-right: 12px;
    min-width: auto;
}

.heatmap-table td:not(:first-child):hover {
    transform: scale(1.15);
    z-index: 1;
    position: relative;
}

/* ----------------------------------------------------------------
   Loading & Error States
   ---------------------------------------------------------------- */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    gap: 20px;
}

.loading__spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--etf-1);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading__text {
    color: var(--text-secondary);
    font-size: 1rem;
}

.error {
    text-align: center;
    padding: 60px 20px;
    color: var(--red);
}

.error__title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.error__message {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ----------------------------------------------------------------
   Footer
   ---------------------------------------------------------------- */
.footer {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-subtle);
    margin-top: 40px;
}

.footer a {
    color: var(--text-secondary);
    text-decoration: none;
}

/* ----------------------------------------------------------------
   Responsive
   ---------------------------------------------------------------- */
@media (max-width: 1024px) {
    .chart-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    html { font-size: 13px; }

    .header__title { font-size: 2rem; }
    .dashboard { padding: 16px 12px; }
    .card { padding: 16px; }
    .chart-container { height: 300px; }
    .metrics-grid { grid-template-columns: repeat(2, 1fr); }
    .holdings-controls { flex-direction: column; }

    .perf-table { font-size: 0.8rem; }
    .perf-table thead th,
    .perf-table tbody td { padding: 10px 8px; }
}

@media (max-width: 480px) {
    .metrics-grid { grid-template-columns: 1fr; }
    .header__meta { flex-direction: column; gap: 8px; }
}

/* ----------------------------------------------------------------
   Animations
   ---------------------------------------------------------------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeInUp 0.5s ease forwards;
}

.card:nth-child(1) { animation-delay: 0.05s; }
.card:nth-child(2) { animation-delay: 0.1s; }
.card:nth-child(3) { animation-delay: 0.15s; }
.card:nth-child(4) { animation-delay: 0.2s; }
.card:nth-child(5) { animation-delay: 0.25s; }
.card:nth-child(6) { animation-delay: 0.3s; }

/* ----------------------------------------------------------------
   Scrollbar
   ---------------------------------------------------------------- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-accent);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ----------------------------------------------------------------
   Tooltip override for Chart.js
   ---------------------------------------------------------------- */
.chartjs-tooltip {
    background: var(--bg-card) !important;
    border: 1px solid var(--border-accent) !important;
    border-radius: var(--radius-md) !important;
    backdrop-filter: blur(12px) !important;
    font-family: 'Inter', sans-serif !important;
}

/* ----------------------------------------------------------------
   Legend toggle styles
   ---------------------------------------------------------------- */
.legend-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-top: 12px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.8rem;
    font-weight: 500;
    user-select: none;
}

.legend-item:hover {
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
}

.legend-item.inactive {
    opacity: 0.35;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}